Ptice

Adrian, Bruno and Goran wanted to join the bird lovers’
club. However, they did not know that all applicants must pass
an entrance exam. The exam consists of $N$ questions, each with three
possible answers: A, B and C.

Unfortunately, they couldn’t tell a bird from a whale so
they are trying to guess the correct answers. Each of the three
boys has a theory of what set of answers will work best: